160 lines
3.4 KiB
C++
160 lines
3.4 KiB
C++
#include "fade.h"
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#include "const.h"
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// Constructor
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Fade::Fade(SDL_Renderer *renderer)
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{
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mRenderer = renderer;
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mBackbuffer = SDL_CreateTexture(mRenderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, GAMECANVAS_WIDTH, GAMECANVAS_HEIGHT);
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if (mBackbuffer == nullptr)
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printf("Backbuffer could not be created!\nSDL Error: %s\n", SDL_GetError());
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}
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// Destructor
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Fade::~Fade()
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{
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SDL_DestroyTexture(mBackbuffer);
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mBackbuffer = nullptr;
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}
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// Inicializa las variables
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void Fade::init(Uint8 r, Uint8 g, Uint8 b)
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{
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mFadeType = FADE_CENTER;
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mEnabled = false;
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mFinished = false;
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mCounter = 0;
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mR = r;
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mG = g;
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mB = b;
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}
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// Pinta una transición en pantalla
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void Fade::render()
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{
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if (mEnabled && !mFinished)
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{
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switch (mFadeType)
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{
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case FADE_FULLSCREEN:
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mRect1 = {0, 0, GAMECANVAS_WIDTH, GAMECANVAS_HEIGHT};
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for (int i = 0; i < 256; i += 4)
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{
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// Dibujamos sobre el renderizador
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SDL_SetRenderTarget(mRenderer, nullptr);
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// Copia el backbuffer con la imagen que había al renderizador
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SDL_RenderCopy(mRenderer, mBackbuffer, nullptr, nullptr);
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SDL_SetRenderDrawColor(mRenderer, mR, mG, mB, i);
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SDL_RenderFillRect(mRenderer, &mRect1);
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// Vuelca el renderizador en pantalla
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SDL_RenderPresent(mRenderer);
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}
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// Deja todos los buffers del mismo color
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SDL_SetRenderTarget(mRenderer, mBackbuffer);
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SDL_SetRenderDrawColor(mRenderer, mR, mG, mB, 255);
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SDL_RenderClear(mRenderer);
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SDL_SetRenderTarget(mRenderer, nullptr);
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SDL_SetRenderDrawColor(mRenderer, mR, mG, mB, 255);
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SDL_RenderClear(mRenderer);
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break;
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case FADE_CENTER:
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mRect1 = {0, 0, GAMECANVAS_WIDTH, 0};
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mRect2 = {0, 0, GAMECANVAS_WIDTH, 0};
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SDL_SetRenderDrawColor(mRenderer, mR, mG, mB, 64);
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for (int i = 0; i < mCounter; i++)
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{
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mRect1.h = mRect2.h = i * 4;
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mRect2.y = GAMECANVAS_HEIGHT - (i * 4);
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SDL_RenderFillRect(mRenderer, &mRect1);
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SDL_RenderFillRect(mRenderer, &mRect2);
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}
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if ((mCounter * 4) > GAMECANVAS_HEIGHT)
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mFinished = true;
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break;
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case FADE_RANDOM_SQUARE:
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mRect1 = {0, 0, 32, 32};
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for (Uint16 i = 0; i < 50; i++)
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{
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// Crea un color al azar
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mR = 255 * (rand() % 2);
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mG = 255 * (rand() % 2);
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mB = 255 * (rand() % 2);
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SDL_SetRenderDrawColor(mRenderer, mR, mG, mB, 64);
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// Dibujamos sobre el backbuffer
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SDL_SetRenderTarget(mRenderer, mBackbuffer);
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mRect1.x = rand() % (GAMECANVAS_WIDTH - mRect1.w);
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mRect1.y = rand() % (GAMECANVAS_HEIGHT - mRect1.h);
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SDL_RenderFillRect(mRenderer, &mRect1);
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// Volvemos a usar el renderizador de forma normal
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SDL_SetRenderTarget(mRenderer, nullptr);
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// Copiamos el backbuffer al renderizador
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SDL_RenderCopy(mRenderer, mBackbuffer, nullptr, nullptr);
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// Volcamos el renderizador en pantalla
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SDL_RenderPresent(mRenderer);
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SDL_Delay(100);
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}
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break;
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default:
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break;
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}
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}
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if (mFinished)
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{
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SDL_SetRenderDrawColor(mRenderer, mR, mG, mB, 255);
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SDL_RenderClear(mRenderer);
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}
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}
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// Actualiza las variables internas
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void Fade::update()
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{
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if (mEnabled)
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mCounter++;
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}
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// Activa el fade
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void Fade::activateFade()
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{
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mEnabled = true;
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mFinished = false;
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mCounter = 0;
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}
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// Comprueba si está activo
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bool Fade::isEnabled()
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{
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return mEnabled;
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}
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// Comprueba si ha terminado la transicion
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bool Fade::hasEnded()
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{
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return mFinished;
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}
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// Establece el tipo de fade
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void Fade::setFadeType(Uint8 fadeType)
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{
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mFadeType = fadeType;
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} |